 /*
  * FreeModbus Libary: RT-Thread Port
  * Copyright (C) 2013 Armink <armink.ztl@gmail.com>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  *
  * File: $Id: port.c,v 1.60 2015/02/01 9:18:05 Armink $
  */

/* ----------------------- System includes --------------------------------*/

/* ----------------------- Modbus includes ----------------------------------*/
#include "port.h"
/* ----------------------- Variables ----------------------------------------*/

/* ----------------------- Start implementation -----------------------------*/
void EnterCriticalSection(void)
{
    taskENTER_CRITICAL();
    //rt_enter_critical();
}

void ExitCriticalSection(void)
{
    taskEXIT_CRITICAL();
    //rt_exit_critical();
}
/*put  bytes in buff*/
void Put_in_fifo(Serial_fifo *buff, uint8_t *putdata, int length) 
{
    portDISABLE_INTERRUPTS();
    while (length--)
    {
        buff->buffer[buff->put_index] = *putdata;
        buff->put_index += 1;
        if (buff->put_index >= FIFO_SIZE_MAX)
        {
            buff->put_index = 0;
        }
        /* if the next position is read index, discard this 'read char' */
        if (buff->put_index == buff->get_index) 
        {
            buff->get_index += 1;
            if (buff->get_index >= FIFO_SIZE_MAX)
            {
                buff->get_index = 0;
            }
           }
    }
    portENABLE_INTERRUPTS();
}
/*get  bytes from buff*/
int Get_from_fifo(Serial_fifo *buff, uint8_t *getdata, int length) 
{
    int size = length;
    /* read from software FIFO */
    while (length) 
    {
        int ch;
        /* disable interrupt */
        portDISABLE_INTERRUPTS();
        if (buff->get_index != buff->put_index)
        {
            ch = buff->buffer[buff->get_index];
            buff->get_index += 1;
            if (buff->get_index >= FIFO_SIZE_MAX)
            {
                buff->get_index = 0;
            }
        } 
        else
        {
            /* no data, enable interrupt and break out */
            portENABLE_INTERRUPTS();
            break;
        }
        *getdata = ch & 0xff;
        getdata++;
        length--;
        /* enable interrupt */
        portENABLE_INTERRUPTS();
    }
    return size - length;
}

#ifndef IS_IRQ()

extern __asm uint32_t vPortGetIPSR(void); //FreeRTOS API

__inline bool IS_IRQ(void) 
{
  if (vPortGetIPSR()) 
  {
    return TRUE;
  }
  return FALSE;
}
#endif // MACRO
